Akademik Veri Yönetim Sistemi
INTERNATIONAL CONFERENCE ON ENGINEERING, NATURAL AND APPLIED SCIENCE 2021 (ICENAS’21), Osmaniye, Türkiye, 24 - 26 Kasım 2021, cilt.1, sa.1, ss.151
Many studies were conducted to investigate dynamic loading effects on structural members. Impact loading is
one of the loading cases that is examined as a subtitle among these dynamic loading. Several numerical,
theoretical, and experimental studies have also been carried out to investigate the behavior of structural members
under the impact loading. In particular, the general approach for defining the velocity of free-falling weight at
impact when performing finite element analysis (FEA) for simulation of the impact loading is to assign the
velocity value calculated as required by the principle of energy conservation. This situation prevents the results
obtained from FEAs from being realistic and accurate. In this study, the effect of the differences between the
experimentally obtained and theoretically calculated impact velocity values in the simulation of the drop-weight
impact test was investigated. For this purpose, the velocities at impact for two different release heights were
obtained indirectly by processing the data obtained via an accelerometer mounted on the free-falling weight with
a signal processing program. Afterward, the cold-formed steel square hollow section (SHS) member was
modeled and subjected to impact loading. Each FEA was performed with the velocity value obtained both
experimentally and theoretically by using ABAQUS/CAE. The deformation modes of the SHS, the time histories
of the reaction forces, and mid-span displacements at its lower and upper faces were obtained and compared for
both cases. The analysis results showed that the difference between the experimentally obtained and theoretically
calculated impact velocity values mainly affected the time histories of the mid-span displacements at lower and
upper faces due to the change in impact energy.